Marine Double Bollard, also known as Double Bitt Boat Bollard.
The Type B marine double bollard, constructed from steel plate in compliance with GBT554-1996 standard, features a dual-horn design extending from a central cylinder to provide secure mooring points for ropes and cables.
Certified by major classification societies including CCS, ABS, BV, LR, NK and RINA, its technical specifications include: base height (h) values representing minimum dimensions for steel decks, requiring 15mm elevation above wooden deck surfaces; optional stainless steel cladding (grade 1Cr18Ni9Ti) for both Type A and B variants; manufacturing options permitting seamless steel pipes or welded plate construction for nominal diameters ≤500mm, with baffle installation available for units ≥250mm.
The bollard's engineering accounts for high-stress mooring operations while maintaining corrosion resistance and structural integrity through standardized manufacturing and installation protocols.
Brand | LGRIG® |
Material | Steel Plate |
Standard | GBT554-1996 Type B |
Style | Marine Double Bollard |

Part No. | Nominal Dia. (mm) | Max. Breaking Load KN | A | D | D1 | h | ≧t | ≧t1 | t2 | H | |
Deck Without Plywood | Deck With Plywood | ||||||||||
LGDB55496B160 | 160 | 49 | 400 | 168 | 210 | 8 | 10 | 6 | 9 | 250 | 310 |
LGDB55496B200 | 200 | 78 | 500 | 219 | 270 | 8 | 10 | 8 | 9 | 300 | 360 |
LGDB55496B250 | 250 | 118 | 630 | 273 | 335 | 8 | 11 | 10 | 9 | 380 | 440 |
LGDB55496B315 | 315 | 196 | 800 | 325 | 390 | 10 | 15 | 12 | 9 | 480 | 540 |
LGDB55496B355 | 355 | 255 | 890 | 351 | 420 | 10 | 17 | 13 | 12 | 530 | 590 |
LGDB55496B400 | 400 | 314 | 1000 | 402 | 480 | 10 | 18 | 14 | 12 | 600 | 660 |
LGDB55496B450 | 450 | 382 | 1130 | 450 | 545 | 10 | 19 | 16 | 12 | 680 | 740 |
LGDB55496B500 | 500 | 451 | 1250 | 500 | 600 | 12 | 20 | 18 | 12 | 750 | 810 |